Let's divide 43717160 by 420
The aim is to understand the frequency of 420 in 43717160.

Advancing to step 1:
If we divide 4 by 420, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 420

Going ahead to step 2:
When dividing 43 by 420, we get 0 with a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 43 and we're left with 43.
Include the next digit (7) from the dividend after 43, then repeat: 437 / 420

Step 3:
When dividing 437 by 420, we get 1 with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 420 from 437 to get 17.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 420

On to step 4:
420 goes into 171 0 times with a remainder of 171.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we take 0 away from 171, we end up with 171.
Take the next digit (7) from the dividend and append it to 171, then repeat: 1717 / 420

Going ahead to step 5:
If we divide 1717 by 420, we get 4 and a remainder of 37.
Write down 4 as next digit of the result. 
Result so far: 104.0
If we take 1680 away from 1717, we end up with 37.
Include the next digit (1) from the dividend after 37, then repeat: 371 / 420

Moving on to step 6:
When dividing 371 by 420, we get 0 with a remainder of 371.
Write down 0 as next digit of the result. 
Result so far: 1040.0
Subtract 0 from 371 to get 371.
Fetch the next digit (6) from the dividend, attach it to 371 and continue: 3716 / 420

Step 7:
420 goes into 3716 8 times with a remainder of 356.
Put 8 as the next digit of the answer. 
Result so far: 10408.0
Subtract 3360 from 3716 to get 356.
Include the next digit (0) from the dividend after 356, then repeat: 3560 / 420

Moving on to step 8:
420 can be fit into 3560 8 times, resulting in a remainder of 200.
Put 8 as the next digit of the answer. 
Result so far: 104088.0
Deduct 3360 from 3560 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Going ahead to step 9:
420 can be fit into 2000 4 times, resulting in a remainder of 320.
The next digit of our result is 4. 
Result so far: 104088.4
If we subtract 1680 from 2000, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 10:
When dividing 3200 by 420, we get 7 with a remainder of 260.
Write down 7 as next digit of the result. 
Result so far: 104088.47
If we subtract 2940 from 3200, we get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

On to step 11:
If we divide 2600 by 420, we get 6 and a remainder of 80.
Write down 6 as next digit of the result. 
Result so far: 104088.476
Subtracting 2520 from 2600 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 12:
The number 420 fits into 800 1 times, leaving a remainder of 380.
The number 1 becomes the next digit in our result. 
Result so far: 104088.4761
Subtracting 420 from 800 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Moving on to step 13:
420 can be fit into 3800 9 times, resulting in a remainder of 20.
Use 9 as the next digit of our solution. 
Result so far: 104088.47619
If we subtract 3780 from 3800, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 14:
If we divide 200 by 420, we get 0 and a remainder of 200.
Put 0 as the next digit of the answer. 
Result so far: 104088.47619
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 15:
420 goes into 2000 4 times with a remainder of 320.
Write down 4 as next digit of the result. 
Result so far: 104088.4761904
If we take 1680 away from 2000, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 16:
If we divide 3200 by 420, we get 7 and a remainder of 260.
Write down 7 as next digit of the result. 
Result so far: 104088.47619047
Subtracting 2940 from 3200 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

The final outcome is 104088.47619047, with a leftover of 2.6e-07.